That was definitely the question I had about it: why did we need Wonka's origin?
I think I would have enjoyed it more if it had been its own, original thing. The movie was visually very fun to look at, it’s just that I was never able to square the fact that this had any meaningful relation to the original film.
Take away the Wonka name, the Oompa-Loompa, and Slugworth, though, and you’ve still got an okay family flick in time for Christmas. Paul Atreides makes magical chocolate with the help of the Downton Abbey butler and foils the evil plans of Mr Bean, Nardole, Olivia Coleman, and 50% of Key and Peele. That would be fine, IMO. There are already tons of movies in that vein that worked well enough and weren’t nearly as visually impressive.
But that’s just me. ActionWife and ActionMother-in-Law both enjoyed it, and that’s the important part.